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-rw-r--r--watch-library/shared/watch/watch_spi.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/watch-library/shared/watch/watch_spi.h b/watch-library/shared/watch/watch_spi.h
index b72b0e0b..ae0554b6 100644
--- a/watch-library/shared/watch/watch_spi.h
+++ b/watch-library/shared/watch/watch_spi.h
@@ -56,8 +56,9 @@ bool watch_spi_write(const uint8_t *buf, uint16_t length);
bool watch_spi_read(uint8_t *buf, uint16_t length);
/** @brief Reads a series of values from a device on the SPI bus.
- * @param buf Storage for the incoming bytes; on return, it will contain the received data.
- * @param length The number of bytes that you wish to receive.
+ * @param data_out Storage for outgoing bytes.
+ * @param data_in Storage for incoming bytes.
+ * @param length The number of bytes to transfer.
* @note This function does not manage the chip select pin (usually A3).
*/
bool watch_spi_transfer(const uint8_t *data_out, uint8_t *data_in, uint16_t length);